Denial of service in Rockwell Automation MicroLogix 1400
| Risk | Medium |
| Patch available | NO |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-22659 |
| CWE-ID | CWE-119 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Allen-Bradley MicroLogix 1400 Hardware solutions / Office equipment, IP-phones, print servers |
| Vendor | Rockwell Automation |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Buffer overflow
EUVDB-ID: #VU50270
Risk: Medium
CVSSv3.1: 7.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:H/E:U/RL:U/RC:C]
CVE-ID: CVE-2021-22659
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to a boundary error. A remote attacker can send a specially crafted Modbus packet, trigger memory corruption, retrieve or modify random values in the register and cause a denial of service condition on the target system.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsAllen-Bradley MicroLogix 1400: 21.6
External linkshttp://ics-cert.us-cert.gov/advisories/icsa-21-033-01
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
